High power 1341.4 nmNd:YAlO3 CW laser and its performances

A lamp pumped high power 1341.4 nmNd:YAlO₃CW laser and its performances have been described. As high as 188 W of CW output power has been obtained at 1341.4 nm alone line with a overall efficiency of 1.37% and a slope efficiency of 2.14%. The divergence (FWHM) and instability (RMS) of this laser at output power of 155 W are 15 mrad and 1.19%, respectively.     

Zur Interpretation der Gaußschen Osterformel und ihrer Ausnahmeregeln

In this paper, I present a revised version of Gauss's Easter formula, which is clearer than the original Easter formula and in which certain exceptions are eliminated. I also describe a method for proving calendar algorithms.Copyright 1997 Academic Press.Die Gaußsche Osterformel wird von einem internen Fehler befreit. Dadurch können die viel kritisierten Ausnahmeregeln entfallen. Es wird eine umgebaute Osterformel angegeben, die besser lesbar und verstehbar ist als die ursprüngliche Gaußsche Osterformel. Es wird eine Beweismethode für Kalenderalgorithmen mitgeteilt.Copyright 1997 Academic Press.È stata rielaborata la formula di Gauss per il calcolo della data pasquale così da rendere superflue le eccezioni. È stato proposto un nuovo concetto di tale formula che risulta meglio leggibile ed intellegibile dell'originale formula di Gauss. È stato descritto un metodo per provare gli algoritmi del calendario.     

Time shifted aliasing error upper bounds for truncated sampling cardinal series

Time shifted aliasing error upper bound extremals for the sampling reconstruction procedure are fully characterized. Sharp upper bounds are found on the aliasing error of truncated cardinal series and the corresponding extremals are described for entire functions from certain specific Lp, p>1, classes. Analogous results are obtained in multidimensional regular sampling. Truncation error analysis is provided in all cases considered. Moreover, sharpness of bounding inequalities, convergence rates and various sufficient conditions are discussed.     

四元Heisenberg群上次拉普拉斯算子的m幂次的基本解

本文研究了四元Heisenberg群上次拉普拉斯算子的m幂次的基本解，该结论是Heisenberg群上结果的推广.本文利用了四元Heisenberg群上的Fourier变换理论构造了该群上次拉普拉斯算子的m幂次的基本解，并且给出了基本解的积分表示.     

矩形校正公式的误差分析

This paper presents truncation errors among Corrector Formula for left Rectangular rule and Corrector Formula for middle Rectangular rule respectively.It also displays an analysis on convergence order of compound corrector formulas for rectangular rule.Examples of numerical calculation have validated theoretical analysis.     

Modeling of Temperature and Strain-Rate Effects in Metals Using an Internal Variable Model

The thermo-viscoplastic behavior of three metals is characterized in a large range of loading conditions by using a new phenomenological constitutive model. The flow stress is decomposed into the sum of an effective stress with an internal stress depending upon an internal parameter which describes the strain hardening effect. The evolution of the internal stress is sensitive to the history of strain-rate and temperature. A systematic method is used for determining the model’s parameters. The model predictions show a good correlation with experimental data. Temperature history effects are especially analyzed.     

耐高压球形锗窗的研制

研制了耐高压的球形锗窗，测量了其光学和力学性能。     

Extremal Problems in the Class of Delta-Subharmonic Functions of Finite Order in a Half-Plane

We obtain exact lower bounds of the upper limits of ratios of the Nevanlinna characteristics of a delta-subharmonic function in the upper half-plane.     

THE POINT PROCESS OF STATETRANSITIONS IN AREGULAR MARKOV CHAIN

1.IntroductionInreliabilitytheory,inordertocalculatethefailurefrequencyofarepairablesystem,Shily]firstintroducedandstudiedthetransitionfrequencybetweentwodisjointstatesetsforafiniteMarkovchainandavectorMarkovprocesswithfinitediscretestatespaceandobtainedageneralformulaoftransitionfrequency.Then,ontheconditionthatthegeneratormatrixofMarkovchainisuniformlybounded,Shi[8'9]againprovedthetransitionfrequencyformulaandobtainedthreeotherusefulformulas.Obviously,thepoint(orcalledcounting)processofsta…     

Control limits for two-state partially observable Markov decision processes

A production process can be in either a GOOD or a BAD state. The true state is unknown and can only be inferred from observations. If the state is good during one period it may deteriorate and become bad during the next period. Two actions are available: CONTINUE or REPLACE (for a fixed cost). The objective is to maximize the expected discounted value of the total future profits.